Electromagnetic beam-tension regulator.



10.815,326. n l EATENTEE MAE.2 0,1906. n. BAUEN. ELECEEOMAGNETIG BEAM TENSION REGULATOR.

APPLICATION lFILED MAY 10. 1905.

lili IWI Ell a En i Syvum/WO? vDArn'EL BACON, OE NEwroEK, N, Y.

To LZZ .whom it may concern:

Be it known that I, DANrEL BACON, a citizen of theV United States, and a resident of Brooklyn borough, New York city, an'd State of New York, have invented certain. new

, and useful Improvements in Electromagnetic "Beam-TensionRegulators, of which the'following is a specification.

e My mvention relates to reels or beams for loomsfand has for its obj ect the providing of v an electromagnetic tension-regulator by means of which theproper tension ofthe reel or beam during the unwinding of the thread or yarn may be automatically adjusted to correspond with the constantly-diminishing quantity of yarn until the beam is exhausted,

when a new supply of .yarn will be furnished.

' In ,present practice it 1s usual to regulate this tension by purely mechanical means, which is vapt to result in an unequal tension on the` variousv warp-threads, which shows itself either in the breaking of individual warpthreads or in some defect of the 'quality of the goods even when the warp-threads remain intact.

By the use of my electromagnetic regu' lator greater regularity and delicacy of tension are brought about automatically by very simple and efficient-means. Y i

As is well known, the necessity for regulating the tension arises from the fact that when the beam carries its full amount of thread, which unwinds from its outer circumference, the beam has the benefit of its maximum leverage, and it has been found in the weaving ofstandard cotton cloths an approximate pull of about two pounds is necessary to turn the beam underi these conditions. When,

however, the beam is nearly unwound and the threads are drawing from a point near the center of the beam, the leverage is at its minimum, and it requires a pull of approximately iifteen pounds to turn the beam. 'As this increase of power required is gradual, corresponding to the decrease in leverage, the object of my invention is to provide an electromagnetic means for compensating for the loss of leverage in af gradual way, so that the tensionA remains constant.

\ One application of my invention is shownv in tine accompanying drawings, in-which- Figure 1 is the front view somewhat in perspective. Fig. 2 is a vertical section of the beam.

Same letters indicate drawings.

Specification of Letters Patent.`

Application led May l0, 1.905. Serial No. 259,681. l

ELECTROMAGNETIC BEAM-TENSION REGULATOR.

Patented Marc-h 2o, 190e.

A isv the-'beam or reel, loosely mounted on a stationary shaft a. This shaft is supported by the stationary frame b. On this frame facing the end of the beamare a number of electromagnets B B, arranged, preferably, in

a circle and in series, and these magnets serve as an electric drag upon vthe beam A by thecreate a magnetic pull or drag equivalent to,

the vdifference in leverage between the maXimumand minimum points of unwindingV of the thread CZ, which unwinding from the reel or beam A passes over the bar C to the loom, v

(not shown,) and by causing this magnetic pull to diminish gradually as the leverage diminishes I enable a Xed power to produce a uniform effect of tension on the thread at all stages of the unwinding. To bring about this gradual reduction of magnetic pull, I provide an energizing mechanism, as shown at the right hand of Fig. 1.

D is an actuating-worm mounted on a worm-shaft e, j ournaled at f in a stationary framework and deriving its revolution from the loom by aconnection (Not shown.) The worm D meshes with the worm-wheel E, mounted on a feed-screwg, whichis journaled y in the brackets ZL h, `which form part of the xed framework. On this feedscrew is threaded the contact-finger F, the rear end ofwhich embraces a guide-rod k, lattached to the stationary framework and serving to prevent the finger from rotating with the feedscrew, while the forward end of the finger makes contact with the successive platesZ Zon the rheostat-bar G, which is mounted upon the framework and communicates by means of the plates with a series of resistance-coils. (Not shown.)

Contact is made. to close the circuit between a battery L and the linger G and elec- -tromagnets B B with the wires w, w, wz, and w3 by means of a switch M and the contactplates Z Z, as follows: To allow the use of various degrees of full strength to the current energizing the electromagnetic drag, I have indicated at m m iive independent sources of lOO electric energyfor of electric resistance, as

needed than for others, and the switch theresimilar parts in both fore should be connected with that current or source of electric energy which is best adapted at full strength to perform the work required. In this way the action of the contact-finger becomes proportionate always to the specific current which may be in use at the time. Without this provision the inger and feed-screw would have to be so arranged that the amount of motion would vary with the variations in energy allowable for full strength, as will be readily understood. During the unwinding of a beam the finger F is expected to travel the entire length of the feed-screw g and pass successively over all of the plates l l, so that the length of this travel l is made to correspond to the unwinding distance from the outer edge of the wound thread to the axle of the beam. As the outer coils of thread are successively longer than the inner, the outer contacteplates Z l are successively longer than the inner. The spaces between successive plates are preferably of uniform width and of such a. size that the forward edge of the contact-finger G reaches the next plate before the rear edge leaves the previous plate. In this way I secure an uninterrupted but constantly-decreasing current during the passage of the contact-finger from one end of the bar to the other.

I claim. An electromagnetic beam-tension regulator which consists of an electromagnetic drag adapted to retard the unwinding of the beam, when energized and a compensating mechanism 'adapted to energize said drag with an electric current automatically decreasing during the unwinding of the beam. DANIEL BACON. 3' Witnesses: 1; f

W. I). PREBLE, Jr., ANNA H. VAN HORENBERG. 

